Truncate verbose source print.

dart/site/try/poi/poi.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library trydart.poi;
 
 import 'dart:async' show
     Completer,
     Future;
 
@@ skipping 179 matching lines @@
     if (counter != globalCounter) throw 'Using old provider';
     printVerbose('fake inputProvider#$counter($uri): $poiCount $count');
     if (uri == script) {
       if (poiCount == count) {
         cachedFileName = uri.toFilePath();
         if (count != 0) {
           cachedFileName = '$cachedFileName.$count.dart';
         }
         printVerbose('Not using cached version of $cachedFileName');
         cache = new io.File(cachedFileName).readAsBytes().then((data) {
-          printVerbose('Read file $cachedFileName: ${UTF8.decode(data)}');
+          printVerbose(
+              'Read file $cachedFileName: '
+              '${UTF8.decode(data.sublist(0, 100), allowMalformed: true)}...');
           return data;
         });
         count++;
       } else {
         printVerbose('Using cached version of $cachedFileName');
       }
       return cache;
     } else {
       printVerbose('Using original provider for $uri');
       return inputProvider(uri);
@@ skipping 507 matching lines @@
     buffer.write('\n');
     indented.write('}');
   }
 }
 
 modelx.ScopeX localScope(modelx.LibraryElementX element) => element.localScope;
 
 modelx.ImportScope importScope(modelx.LibraryElementX element) {
   return element.importScope;
 }